./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:15:49,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:15:49,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:15:49,666 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:15:49,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:15:49,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:15:49,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:15:49,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:15:49,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:15:49,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:15:49,712 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:15:49,713 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:15:49,714 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:15:49,714 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:15:49,716 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:15:49,717 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:15:49,717 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:15:49,718 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:15:49,718 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:15:49,718 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:15:49,718 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:15:49,723 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:15:49,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:15:49,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:15:49,724 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:15:49,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:15:49,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:15:49,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:15:49,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:15:49,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:15:49,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:15:49,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:15:49,726 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:15:49,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:15:49,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:15:49,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:15:49,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:15:49,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:15:49,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:15:49,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:15:49,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:15:49,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:15:49,730 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:15:49,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:15:49,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:15:49,732 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:15:49,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:15:49,732 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2024-11-09 06:15:50,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:15:50,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:15:50,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:15:50,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:15:50,131 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:15:50,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c Unable to find full path for "g++" [2024-11-09 06:15:52,323 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:15:52,502 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:15:52,503 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2024-11-09 06:15:52,512 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/data/666b224e7/0cb368876650461a91194196dea0ee68/FLAGba780d448 [2024-11-09 06:15:52,529 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/data/666b224e7/0cb368876650461a91194196dea0ee68 [2024-11-09 06:15:52,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:15:52,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:15:52,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:15:52,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:15:52,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:15:52,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a66c2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52, skipping insertion in model container [2024-11-09 06:15:52,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,565 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:15:52,769 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2024-11-09 06:15:52,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:15:52,840 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:15:52,859 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421] [2024-11-09 06:15:52,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:15:52,918 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:15:52,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52 WrapperNode [2024-11-09 06:15:52,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:15:52,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:15:52,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:15:52,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:15:52,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,937 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,972 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 138 [2024-11-09 06:15:52,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:15:52,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:15:52,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:15:52,973 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:15:52,988 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:52,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:15:53,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:15:53,035 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:15:53,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:15:53,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (1/1) ... [2024-11-09 06:15:53,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:15:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:15:53,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:15:53,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:15:53,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:15:53,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:15:53,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:15:53,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 06:15:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:15:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:15:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:15:53,231 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:15:53,233 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:15:53,563 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-09 06:15:53,563 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:15:53,588 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:15:53,588 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:15:53,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:15:53 BoogieIcfgContainer [2024-11-09 06:15:53,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:15:53,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:15:53,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:15:53,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:15:53,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:15:52" (1/3) ... [2024-11-09 06:15:53,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3032bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:15:53, skipping insertion in model container [2024-11-09 06:15:53,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:15:52" (2/3) ... [2024-11-09 06:15:53,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3032bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:15:53, skipping insertion in model container [2024-11-09 06:15:53,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:15:53" (3/3) ... [2024-11-09 06:15:53,599 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2024-11-09 06:15:53,618 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:15:53,618 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:15:53,690 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:15:53,699 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b036b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:15:53,699 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:15:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-09 06:15:53,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:15:53,714 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:15:53,715 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:15:53,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:15:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1246277494, now seen corresponding path program 1 times [2024-11-09 06:15:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:15:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871617790] [2024-11-09 06:15:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:15:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:15:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:15:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:15:54,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:15:54,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871617790] [2024-11-09 06:15:54,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871617790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:15:54,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:15:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:15:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176560098] [2024-11-09 06:15:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:15:54,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:15:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:15:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:15:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:15:54,239 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:15:54,459 INFO L93 Difference]: Finished difference Result 80 states and 125 transitions. [2024-11-09 06:15:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:15:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-09 06:15:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:15:54,482 INFO L225 Difference]: With dead ends: 80 [2024-11-09 06:15:54,482 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:15:54,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:15:54,493 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:15:54,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:15:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:15:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 06:15:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 61 transitions. [2024-11-09 06:15:54,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 61 transitions. Word has length 26 [2024-11-09 06:15:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:15:54,556 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 61 transitions. [2024-11-09 06:15:54,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 61 transitions. [2024-11-09 06:15:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 06:15:54,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:15:54,561 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:15:54,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:15:54,562 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:15:54,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:15:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -507395557, now seen corresponding path program 1 times [2024-11-09 06:15:54,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:15:54,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521414825] [2024-11-09 06:15:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:15:54,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:15:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:15:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:15:54,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:15:54,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521414825] [2024-11-09 06:15:54,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521414825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:15:54,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:15:54,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:15:54,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439099998] [2024-11-09 06:15:54,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:15:54,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:15:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:15:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:15:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:15:54,758 INFO L87 Difference]: Start difference. First operand 40 states and 61 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:15:55,023 INFO L93 Difference]: Finished difference Result 91 states and 149 transitions. [2024-11-09 06:15:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:15:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 06:15:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:15:55,025 INFO L225 Difference]: With dead ends: 91 [2024-11-09 06:15:55,026 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 06:15:55,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:15:55,030 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:15:55,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:15:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 06:15:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-09 06:15:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-11-09 06:15:55,053 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 28 [2024-11-09 06:15:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:15:55,054 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-11-09 06:15:55,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:15:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-11-09 06:15:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 06:15:55,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:15:55,056 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:15:55,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:15:55,058 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:15:55,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:15:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1113139821, now seen corresponding path program 1 times [2024-11-09 06:15:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:15:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684920028] [2024-11-09 06:15:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:15:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:15:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:15:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 06:15:55,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:15:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684920028] [2024-11-09 06:15:55,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684920028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:15:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416921381] [2024-11-09 06:15:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:15:55,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:15:55,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:15:55,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:15:55,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:15:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:15:55,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:15:55,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:15:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 06:15:55,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:15:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 06:15:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416921381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:15:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158779948] [2024-11-09 06:15:55,632 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:15:55,632 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:15:55,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:15:55,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:15:55,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:15:59,216 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:16:00,012 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (let ((.cse0 (<= 1 c_~SIZE~0)) (.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_152|)) (.cse2 (= |v_ULTIMATE.start_main_~i~0#1_152| 0))) (and (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_152| c_~SIZE~0)) (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_147| Int)) (let ((.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_147|)) (.cse3 (= |v_ULTIMATE.start_main_~i~0#1_147| 0))) (and (or (and .cse3 (exists ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (let ((.cse5 (= |v_ULTIMATE.start_main_~i~0#1_142| 0)) (.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_142|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_142|) (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_142| c_~SIZE~0) .cse4) .cse5) (or .cse5 (and .cse0 .cse4)))))) (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_147| c_~SIZE~0) .cse6)) (or (and .cse0 .cse6) .cse3) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_147|)))))) (or (and .cse0 .cse1) .cse2) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_152|)))) is different from true [2024-11-09 06:16:01,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '700#(exists ((|v_ULTIMATE.start_main_~i~0#1_152| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_152|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_152| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_152|) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_152|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_152|)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_147| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_147|) (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_147|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_147|)) (and (= |v_ULTIMATE.start_main_~i~0#1_147| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_142|)) (= |v_ULTIMATE.start_main_~i~0#1_142| 0)) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_142|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_142|)) (= |v_ULTIMATE.start_main_~i~0#1_142| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_142|))))) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_147|)) (= |v_ULTIMATE.start_main_~i~0#1_147| 0)))) (= |v_ULTIMATE.start_main_~i~0#1_152| 0)))))' at error location [2024-11-09 06:16:01,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:16:01,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:16:01,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 06:16:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418447951] [2024-11-09 06:16:01,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:16:01,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:16:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:16:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:16:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=359, Unknown=1, NotChecked=40, Total=506 [2024-11-09 06:16:01,341 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:16:01,502 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2024-11-09 06:16:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:16:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-09 06:16:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:16:01,504 INFO L225 Difference]: With dead ends: 116 [2024-11-09 06:16:01,504 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 06:16:01,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=106, Invalid=359, Unknown=1, NotChecked=40, Total=506 [2024-11-09 06:16:01,507 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:16:01,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:16:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 06:16:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2024-11-09 06:16:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-09 06:16:01,515 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2024-11-09 06:16:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:16:01,516 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-09 06:16:01,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-09 06:16:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 06:16:01,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:16:01,518 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:16:01,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:16:01,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:01,723 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:16:01,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:16:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1473282898, now seen corresponding path program 2 times [2024-11-09 06:16:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:16:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139730739] [2024-11-09 06:16:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:16:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:16:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 06:16:02,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:16:02,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139730739] [2024-11-09 06:16:02,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139730739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:16:02,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665023459] [2024-11-09 06:16:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:16:02,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:16:02,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:16:02,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:16:02,124 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 06:16:02,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:16:02,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 06:16:02,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:16:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 06:16:02,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:16:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 06:16:02,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665023459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:16:02,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916776483] [2024-11-09 06:16:02,350 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:16:02,350 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:16:02,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:16:02,351 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:16:02,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:16:04,666 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:16:05,564 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_229| Int)) (let ((.cse2 (= |v_ULTIMATE.start_main_~i~0#1_229| 0)) (.cse0 (<= 1 c_~SIZE~0)) (.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_229|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_229|) (or (and .cse0 .cse1) .cse2) (or (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_224| Int)) (let ((.cse3 (= |v_ULTIMATE.start_main_~i~0#1_224| 0)) (.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_224|))) (and (or .cse3 (and .cse0 .cse4)) (or (and .cse3 (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (let ((.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_219|)) (.cse6 (= |v_ULTIMATE.start_main_~i~0#1_219| 0))) (and (or (and .cse0 .cse5) .cse6) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_219|) (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_219| c_~SIZE~0) .cse5) .cse6))))) (and .cse0 .cse4 (= |v_ULTIMATE.start_main_~i~0#1_224| c_~SIZE~0))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_224|))))) (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_229| c_~SIZE~0)))))) is different from true [2024-11-09 06:16:06,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1251#(exists ((|v_ULTIMATE.start_main_~i~0#1_229| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_229|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_229|)) (and (= |v_ULTIMATE.start_main_~i~0#1_229| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_224| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_224|) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_224|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_224| 0)) (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_224|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_224|) (<= 1 ~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_219|)) (= |v_ULTIMATE.start_main_~i~0#1_219| 0)) (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_219|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_219|)) (= |v_ULTIMATE.start_main_~i~0#1_219| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_219|))) (= |v_ULTIMATE.start_main_~i~0#1_224| 0))))))) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_229|)) (= |v_ULTIMATE.start_main_~i~0#1_229| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_229|)))' at error location [2024-11-09 06:16:06,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:16:06,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:16:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-09 06:16:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018308415] [2024-11-09 06:16:06,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:16:06,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:16:06,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:16:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:16:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=391, Unknown=1, NotChecked=42, Total=552 [2024-11-09 06:16:06,449 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:16:06,653 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2024-11-09 06:16:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:16:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-09 06:16:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:16:06,655 INFO L225 Difference]: With dead ends: 122 [2024-11-09 06:16:06,655 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 06:16:06,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=429, Unknown=1, NotChecked=44, Total=600 [2024-11-09 06:16:06,657 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:16:06,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 17 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:16:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 06:16:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2024-11-09 06:16:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2024-11-09 06:16:06,666 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 50 [2024-11-09 06:16:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:16:06,666 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2024-11-09 06:16:06,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2024-11-09 06:16:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 06:16:06,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:16:06,669 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:16:06,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:16:06,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:06,873 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:16:06,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:16:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash 863347236, now seen corresponding path program 3 times [2024-11-09 06:16:06,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:16:06,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802497089] [2024-11-09 06:16:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:16:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:16:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:16:13,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:16:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802497089] [2024-11-09 06:16:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802497089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:16:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123670371] [2024-11-09 06:16:13,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:16:13,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:16:13,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:16:13,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:16:13,931 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:16:13,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:16:13,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 06:16:13,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:16:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:16:15,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:16:18,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:16:18,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-09 06:16:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:16:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123670371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:16:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521940454] [2024-11-09 06:16:18,359 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:16:18,359 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:16:18,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:16:18,360 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:16:18,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:16:20,002 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:16:20,798 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_324| Int)) (let ((.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_324|)) (.cse2 (= |v_ULTIMATE.start_main_~i~0#1_324| 0)) (.cse0 (<= 1 c_~SIZE~0))) (and (or (and .cse0 .cse1) .cse2) (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_324| c_~SIZE~0)) (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_319| Int)) (let ((.cse4 (= |v_ULTIMATE.start_main_~i~0#1_319| 0)) (.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_319|))) (and (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_319| c_~SIZE~0) .cse3) (and .cse4 (exists ((|v_ULTIMATE.start_main_~i~0#1_314| Int)) (let ((.cse6 (= |v_ULTIMATE.start_main_~i~0#1_314| 0)) (.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_314|))) (and (or (and .cse0 .cse5 (= |v_ULTIMATE.start_main_~i~0#1_314| c_~SIZE~0)) .cse6) (or .cse6 (and .cse0 .cse5)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_314|)))))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_319|) (or .cse4 (and .cse0 .cse3))))))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_324|)))) is different from true [2024-11-09 06:16:24,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2035#(exists ((|v_ULTIMATE.start_main_~i~0#1_324| Int)) (and (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_324|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_324|)) (and (= |v_ULTIMATE.start_main_~i~0#1_324| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_319| Int)) (and (or (and (= |v_ULTIMATE.start_main_~i~0#1_319| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_314| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_314| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_314|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_314|))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_314|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_314| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_314|)))) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_319|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_319|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_319|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_319|)) (= |v_ULTIMATE.start_main_~i~0#1_319| 0)))))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_324|) (or (= |v_ULTIMATE.start_main_~i~0#1_324| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_324|)))))' at error location [2024-11-09 06:16:24,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:16:24,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:16:24,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 29] total 75 [2024-11-09 06:16:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660786534] [2024-11-09 06:16:24,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:16:24,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-09 06:16:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:16:24,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-09 06:16:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=7648, Unknown=1, NotChecked=176, Total=8190 [2024-11-09 06:16:24,257 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 75 states, 75 states have (on average 2.64) internal successors, (198), 75 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:16:28,187 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2024-11-09 06:16:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 06:16:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 75 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-09 06:16:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:16:28,191 INFO L225 Difference]: With dead ends: 142 [2024-11-09 06:16:28,191 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 06:16:28,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=425, Invalid=9478, Unknown=1, NotChecked=196, Total=10100 [2024-11-09 06:16:28,203 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 4235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:16:28,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 579 Invalid, 4235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 06:16:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 06:16:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2024-11-09 06:16:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2024-11-09 06:16:28,224 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 70 [2024-11-09 06:16:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:16:28,225 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2024-11-09 06:16:28,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 75 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2024-11-09 06:16:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 06:16:28,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:16:28,227 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:16:28,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:16:28,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:28,432 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:16:28,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:16:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -715823191, now seen corresponding path program 4 times [2024-11-09 06:16:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:16:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433549122] [2024-11-09 06:16:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:16:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:16:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:16:28,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:16:28,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433549122] [2024-11-09 06:16:28,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433549122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:16:28,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179983459] [2024-11-09 06:16:28,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:16:28,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:16:28,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:16:28,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:16:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:28,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:16:28,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:16:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:16:28,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:16:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:16:28,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179983459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:16:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341338422] [2024-11-09 06:16:28,826 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:16:28,826 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:16:28,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:16:28,827 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:16:28,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:16:30,437 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:16:31,203 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_415| Int)) (let ((.cse0 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_415|)) (.cse5 (= |v_ULTIMATE.start_main_~i~0#1_415| 0))) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_410| Int)) (let ((.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_410|)) (.cse2 (= |v_ULTIMATE.start_main_~i~0#1_410| 0))) (and (or (and .cse0 .cse1) .cse2) (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_410| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_405| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_405|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_405| 0))) (and (or (and .cse0 .cse3) .cse4) (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_405| c_~SIZE~0) .cse3) .cse4) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_405|)))) .cse2)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_410|)))) .cse5) (and .cse0 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_415| c_~SIZE~0))) (or (and .cse0 .cse6) .cse5) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_415|)))) is different from true [2024-11-09 06:16:32,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2897#(exists ((|v_ULTIMATE.start_main_~i~0#1_415| Int)) (and (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_415|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_415|)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_410| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_410|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_410|)) (= |v_ULTIMATE.start_main_~i~0#1_410| 0)) (or (and (= |v_ULTIMATE.start_main_~i~0#1_410| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_405| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_405|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_405|)) (= |v_ULTIMATE.start_main_~i~0#1_405| 0)) (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_405|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_405|)) (= |v_ULTIMATE.start_main_~i~0#1_405| 0))))) (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_410|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_410|))))) (= |v_ULTIMATE.start_main_~i~0#1_415| 0))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_415|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_415|)) (= |v_ULTIMATE.start_main_~i~0#1_415| 0))))' at error location [2024-11-09 06:16:32,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:16:32,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:16:32,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 06:16:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847998301] [2024-11-09 06:16:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:16:32,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:16:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:16:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:16:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=678, Unknown=1, NotChecked=54, Total=870 [2024-11-09 06:16:32,413 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:16:32,919 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2024-11-09 06:16:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:16:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-09 06:16:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:16:32,921 INFO L225 Difference]: With dead ends: 276 [2024-11-09 06:16:32,921 INFO L226 Difference]: Without dead ends: 156 [2024-11-09 06:16:32,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 180 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=158, Invalid=775, Unknown=1, NotChecked=58, Total=992 [2024-11-09 06:16:32,924 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:16:32,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:16:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-09 06:16:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 139. [2024-11-09 06:16:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2024-11-09 06:16:32,949 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 72 [2024-11-09 06:16:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:16:32,949 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2024-11-09 06:16:32,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2024-11-09 06:16:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 06:16:32,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:16:32,952 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:16:32,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:16:33,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:16:33,153 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:16:33,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:16:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1887854194, now seen corresponding path program 5 times [2024-11-09 06:16:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:16:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845832703] [2024-11-09 06:16:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:16:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:16:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 06:16:33,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:16:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845832703] [2024-11-09 06:16:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845832703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:16:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808368973] [2024-11-09 06:16:33,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:16:33,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:16:33,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:16:33,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:16:33,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:16:33,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:16:33,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:16:33,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:16:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 06:16:33,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:16:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 06:16:33,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808368973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:16:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254363939] [2024-11-09 06:16:33,719 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:16:33,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:16:33,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:16:33,719 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:16:33,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:16:35,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:16:35,853 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_507| Int)) (let ((.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_507|)) (.cse2 (= |v_ULTIMATE.start_main_~i~0#1_507| 0)) (.cse0 (<= 1 c_~SIZE~0))) (and (or (and .cse0 .cse1) .cse2) (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_507| c_~SIZE~0) .cse1) (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (let ((.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_502|)) (.cse5 (= |v_ULTIMATE.start_main_~i~0#1_502| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_502|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_497| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_497|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_497| 0))) (and (or (and .cse0 .cse3) .cse4) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_497|) (or (and .cse0 .cse3 (= |v_ULTIMATE.start_main_~i~0#1_497| c_~SIZE~0)) .cse4)))) .cse5) (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_502| c_~SIZE~0) .cse6)) (or (and .cse0 .cse6) .cse5)))))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_507|)))) is different from true [2024-11-09 06:16:36,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3977#(exists ((|v_ULTIMATE.start_main_~i~0#1_507| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_507|)) (= |v_ULTIMATE.start_main_~i~0#1_507| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_507|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_507|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_507|)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_502| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_502|)) (= |v_ULTIMATE.start_main_~i~0#1_502| 0)) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_497| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_497|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_497| 0)) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_497|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_497|)) (= |v_ULTIMATE.start_main_~i~0#1_497| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_497|))) (= |v_ULTIMATE.start_main_~i~0#1_502| 0)) (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_502|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_502|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_502|))) (= |v_ULTIMATE.start_main_~i~0#1_507| 0)))))' at error location [2024-11-09 06:16:36,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:16:36,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:16:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 06:16:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264756835] [2024-11-09 06:16:36,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:16:36,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:16:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:16:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:16:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=620, Unknown=1, NotChecked=52, Total=812 [2024-11-09 06:16:36,800 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:16:37,199 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2024-11-09 06:16:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:16:37,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-09 06:16:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:16:37,200 INFO L225 Difference]: With dead ends: 155 [2024-11-09 06:16:37,200 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 06:16:37,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 186 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=218, Invalid=907, Unknown=1, NotChecked=64, Total=1190 [2024-11-09 06:16:37,201 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:16:37,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 32 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:16:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 06:16:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2024-11-09 06:16:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-11-09 06:16:37,211 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 74 [2024-11-09 06:16:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:16:37,211 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-11-09 06:16:37,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:16:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-11-09 06:16:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 06:16:37,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:16:37,213 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:16:37,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:16:37,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:37,418 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:16:37,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:16:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1599080091, now seen corresponding path program 6 times [2024-11-09 06:16:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:16:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179161903] [2024-11-09 06:16:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:16:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:16:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:16:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:16:49,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:16:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179161903] [2024-11-09 06:16:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179161903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:16:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025010462] [2024-11-09 06:16:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:16:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:16:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:16:49,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:16:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:16:49,334 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:16:49,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:16:49,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-09 06:16:49,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:16:49,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 06:16:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:16:53,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:16:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 06:16:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025010462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:16:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748007580] [2024-11-09 06:16:59,781 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:16:59,781 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:16:59,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:16:59,782 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:16:59,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:17:01,016 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:17:01,794 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_623| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_623|)) (.cse1 (<= 1 c_~SIZE~0)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_623| 0))) (and (or .cse0 (and .cse1 .cse2)) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_main_~i~0#1_623| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_618| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_618|)) (.cse6 (= |v_ULTIMATE.start_main_~i~0#1_618| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_618|) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_618| c_~SIZE~0) .cse3) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_613| Int)) (let ((.cse4 (= |v_ULTIMATE.start_main_~i~0#1_613| 0)) (.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_613|))) (and (or .cse4 (and .cse1 .cse5 (= |v_ULTIMATE.start_main_~i~0#1_613| c_~SIZE~0))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_613|) (or .cse4 (and .cse1 .cse5))))) .cse6)) (or (and .cse1 .cse3) .cse6)))) .cse0)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_623|)))) is different from true [2024-11-09 06:17:08,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5031#(exists ((|v_ULTIMATE.start_main_~i~0#1_623| Int)) (and (or (and (= |v_ULTIMATE.start_main_~i~0#1_623| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_618| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_618|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_613| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_613|) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_613|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_613|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_613| 0)) (or (= |v_ULTIMATE.start_main_~i~0#1_613| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_613|) (<= 1 ~SIZE~0))))) (= |v_ULTIMATE.start_main_~i~0#1_618| 0)) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_618|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_618|))) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_618|)) (= |v_ULTIMATE.start_main_~i~0#1_618| 0))))) (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_623|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_623|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_623|) (or (= |v_ULTIMATE.start_main_~i~0#1_623| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_623|)))))' at error location [2024-11-09 06:17:08,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:17:08,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:17:08,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 36, 39] total 121 [2024-11-09 06:17:08,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470535729] [2024-11-09 06:17:08,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:17:08,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-09 06:17:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:17:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-09 06:17:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=17782, Unknown=1, NotChecked=268, Total=18632 [2024-11-09 06:17:08,164 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 121 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:17:37,898 INFO L93 Difference]: Finished difference Result 459 states and 513 transitions. [2024-11-09 06:17:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-09 06:17:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2024-11-09 06:17:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:17:37,903 INFO L225 Difference]: With dead ends: 459 [2024-11-09 06:17:37,903 INFO L226 Difference]: Without dead ends: 379 [2024-11-09 06:17:37,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 180 SyntacticMatches, 13 SemanticMatches, 226 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11752 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=2578, Invalid=48727, Unknown=1, NotChecked=450, Total=51756 [2024-11-09 06:17:37,917 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1029 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 15204 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 16124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 15204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:17:37,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 716 Invalid, 16124 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [920 Valid, 15204 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2024-11-09 06:17:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-11-09 06:17:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 199. [2024-11-09 06:17:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.121212121212121) internal successors, (222), 198 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2024-11-09 06:17:37,965 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 92 [2024-11-09 06:17:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:17:37,966 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2024-11-09 06:17:37,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2024-11-09 06:17:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 06:17:37,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:17:37,969 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:17:37,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:17:38,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:17:38,170 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:17:38,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:17:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1565558976, now seen corresponding path program 7 times [2024-11-09 06:17:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:17:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937363868] [2024-11-09 06:17:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:17:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:17:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:17:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:17:38,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:17:38,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937363868] [2024-11-09 06:17:38,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937363868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:17:38,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529164073] [2024-11-09 06:17:38,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:17:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:17:38,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:17:38,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:17:38,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:17:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:17:38,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:17:38,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:17:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:17:38,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:17:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 06:17:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529164073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:17:38,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872340597] [2024-11-09 06:17:38,813 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:17:38,814 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:17:38,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:17:38,816 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:17:38,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:17:40,369 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:17:41,140 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_727| Int)) (let ((.cse2 (= |v_ULTIMATE.start_main_~i~0#1_727| 0)) (.cse0 (<= 1 c_~SIZE~0)) (.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_727|))) (and (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_727| c_~SIZE~0)) (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_722| Int)) (let ((.cse5 (= |v_ULTIMATE.start_main_~i~0#1_722| 0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_722|))) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_717| Int)) (let ((.cse4 (= |v_ULTIMATE.start_main_~i~0#1_717| 0)) (.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_717|))) (and (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_717| c_~SIZE~0) .cse3) .cse4) (or .cse4 (and .cse0 .cse3)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_717|)))) .cse5) (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_722| c_~SIZE~0) .cse6)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_722|) (or .cse5 (and .cse0 .cse6))))))) (or .cse2 (and .cse0 .cse1)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_727|)))) is different from true [2024-11-09 06:17:42,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6765#(exists ((|v_ULTIMATE.start_main_~i~0#1_727| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_727|) (or (and (= |v_ULTIMATE.start_main_~i~0#1_727| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_722| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_722| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_722|))) (or (and (= |v_ULTIMATE.start_main_~i~0#1_722| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_717| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_717|) (or (= |v_ULTIMATE.start_main_~i~0#1_717| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_717|))) (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_717|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_717|)) (= |v_ULTIMATE.start_main_~i~0#1_717| 0))))) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_722|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_722|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_722|)))) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_727|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_727|) (<= 1 ~SIZE~0))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_727|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_727| 0))))' at error location [2024-11-09 06:17:42,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:17:42,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:17:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-09 06:17:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783046914] [2024-11-09 06:17:42,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:17:42,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:17:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:17:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:17:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=835, Unknown=1, NotChecked=60, Total=1056 [2024-11-09 06:17:42,755 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:17:43,417 INFO L93 Difference]: Finished difference Result 381 states and 429 transitions. [2024-11-09 06:17:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:17:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-09 06:17:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:17:43,419 INFO L225 Difference]: With dead ends: 381 [2024-11-09 06:17:43,419 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 06:17:43,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=196, Invalid=997, Unknown=1, NotChecked=66, Total=1260 [2024-11-09 06:17:43,421 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 201 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:17:43,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 45 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:17:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 06:17:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2024-11-09 06:17:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 144 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2024-11-09 06:17:43,444 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 94 [2024-11-09 06:17:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:17:43,445 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2024-11-09 06:17:43,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2024-11-09 06:17:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 06:17:43,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:17:43,448 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:17:43,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 06:17:43,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 06:17:43,652 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:17:43,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:17:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1330489383, now seen corresponding path program 8 times [2024-11-09 06:17:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:17:43,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144573693] [2024-11-09 06:17:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:17:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:17:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:17:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-09 06:17:43,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:17:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144573693] [2024-11-09 06:17:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144573693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:17:43,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550042033] [2024-11-09 06:17:43,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:17:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:17:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:17:43,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:17:43,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:17:44,106 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 06:17:44,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:17:44,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:17:44,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:17:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-09 06:17:44,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:17:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-09 06:17:44,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550042033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:17:44,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143551852] [2024-11-09 06:17:44,435 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:17:44,435 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:17:44,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:17:44,437 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:17:44,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:17:45,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:17:46,445 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_821| Int)) (let ((.cse5 (= |v_ULTIMATE.start_main_~i~0#1_821| 0)) (.cse1 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_821|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_821|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_816| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_816|)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_816| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_816|) (or .cse0 (and .cse1 .cse2)) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_main_~i~0#1_816| c_~SIZE~0)) (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_811| Int)) (let ((.cse3 (= |v_ULTIMATE.start_main_~i~0#1_811| 0)) (.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_811|))) (and (or .cse3 (and .cse1 .cse4)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_811|) (or .cse3 (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_811| c_~SIZE~0) .cse4)))))))))) .cse5) (and .cse1 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_821| c_~SIZE~0))) (or .cse5 (and .cse1 .cse6))))) is different from true [2024-11-09 06:17:47,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8196#(exists ((|v_ULTIMATE.start_main_~i~0#1_821| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_821|) (or (and (= |v_ULTIMATE.start_main_~i~0#1_821| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_816| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_816| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_816|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_816|) (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_816|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_816|)) (and (= |v_ULTIMATE.start_main_~i~0#1_816| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_811| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_811|) (or (= |v_ULTIMATE.start_main_~i~0#1_811| 0) (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_811|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_811|))) (or (= |v_ULTIMATE.start_main_~i~0#1_811| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_811|)))))))))) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_821|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_821|))) (or (= |v_ULTIMATE.start_main_~i~0#1_821| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_821|)))))' at error location [2024-11-09 06:17:47,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:17:47,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:17:47,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-09 06:17:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362037467] [2024-11-09 06:17:47,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:17:47,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:17:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:17:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:17:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=771, Unknown=1, NotChecked=58, Total=992 [2024-11-09 06:17:47,713 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:17:48,329 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2024-11-09 06:17:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:17:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-09 06:17:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:17:48,331 INFO L225 Difference]: With dead ends: 161 [2024-11-09 06:17:48,331 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 06:17:48,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 276 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=279, Invalid=1206, Unknown=1, NotChecked=74, Total=1560 [2024-11-09 06:17:48,332 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:17:48,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 29 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:17:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 06:17:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-11-09 06:17:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2024-11-09 06:17:48,348 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 104 [2024-11-09 06:17:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:17:48,349 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2024-11-09 06:17:48,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:17:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2024-11-09 06:17:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 06:17:48,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:17:48,351 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:17:48,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:17:48,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:17:48,552 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:17:48,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:17:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2054797358, now seen corresponding path program 9 times [2024-11-09 06:17:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:17:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759938998] [2024-11-09 06:17:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:17:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:17:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:18:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:18:04,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:18:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759938998] [2024-11-09 06:18:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759938998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:18:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993305943] [2024-11-09 06:18:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:18:04,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:18:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:18:04,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:18:04,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:18:04,263 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:18:04,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:18:04,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-09 06:18:04,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:18:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:18:11,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:18:22,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:18:22,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2024-11-09 06:18:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:18:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993305943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:18:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668004369] [2024-11-09 06:18:23,755 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:18:23,755 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:18:23,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:18:23,756 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:18:23,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:18:25,164 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:18:25,920 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_959| Int)) (let ((.cse1 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_959|)) (.cse5 (= |v_ULTIMATE.start_main_~i~0#1_959| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_959|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_954| Int)) (let ((.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_954|)) (.cse3 (= |v_ULTIMATE.start_main_~i~0#1_954| 0))) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_949| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_949|)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_949| 0))) (and (or .cse0 (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_949| c_~SIZE~0) .cse2)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_949|) (or (and .cse1 .cse2) .cse0)))) .cse3) (and .cse1 .cse4 (= |v_ULTIMATE.start_main_~i~0#1_954| c_~SIZE~0))) (or (and .cse1 .cse4) .cse3) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_954|)))) .cse5) (and .cse1 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_959| c_~SIZE~0))) (or (and .cse1 .cse6) .cse5)))) is different from true [2024-11-09 06:18:34,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9464#(exists ((|v_ULTIMATE.start_main_~i~0#1_959| Int)) (and (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_959|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_959|) (<= 1 ~SIZE~0)) (and (= |v_ULTIMATE.start_main_~i~0#1_959| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_954| Int)) (and (or (and (= |v_ULTIMATE.start_main_~i~0#1_954| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_949| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_949|)) (= |v_ULTIMATE.start_main_~i~0#1_949| 0)) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_949|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_949|)) (= |v_ULTIMATE.start_main_~i~0#1_949| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_949|)))) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_954|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_954|))) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_954|)) (= |v_ULTIMATE.start_main_~i~0#1_954| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_954|))))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_959|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_959| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_959|)))' at error location [2024-11-09 06:18:34,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:18:34,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:18:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 46, 49] total 152 [2024-11-09 06:18:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002832863] [2024-11-09 06:18:34,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:18:34,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2024-11-09 06:18:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:18:34,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2024-11-09 06:18:34,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=27007, Unknown=1, NotChecked=330, Total=28056 [2024-11-09 06:18:34,914 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 152 states, 152 states have (on average 2.1184210526315788) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:19:13,714 INFO L93 Difference]: Finished difference Result 417 states and 462 transitions. [2024-11-09 06:19:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-09 06:19:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.1184210526315788) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-09 06:19:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:19:13,716 INFO L225 Difference]: With dead ends: 417 [2024-11-09 06:19:13,716 INFO L226 Difference]: Without dead ends: 319 [2024-11-09 06:19:13,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 224 SyntacticMatches, 15 SemanticMatches, 255 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14812 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=2373, Invalid=62910, Unknown=1, NotChecked=508, Total=65792 [2024-11-09 06:19:13,723 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1846 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 18982 mSolverCounterSat, 1795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 20777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1795 IncrementalHoareTripleChecker+Valid, 18982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:19:13,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1846 Valid, 639 Invalid, 20777 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1795 Valid, 18982 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2024-11-09 06:19:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-09 06:19:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 243. [2024-11-09 06:19:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0950413223140496) internal successors, (265), 242 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 265 transitions. [2024-11-09 06:19:13,785 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 265 transitions. Word has length 114 [2024-11-09 06:19:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:19:13,786 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 265 transitions. [2024-11-09 06:19:13,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.1184210526315788) internal successors, (322), 152 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 265 transitions. [2024-11-09 06:19:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 06:19:13,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:19:13,788 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:19:13,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:19:13,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:19:13,989 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:19:13,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:19:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 820448055, now seen corresponding path program 10 times [2024-11-09 06:19:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:19:13,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588575323] [2024-11-09 06:19:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:19:13,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:19:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:19:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 06:19:14,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:19:14,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588575323] [2024-11-09 06:19:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588575323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:19:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347854092] [2024-11-09 06:19:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:19:14,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:19:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:19:14,274 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:19:14,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:19:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:19:14,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:19:14,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:19:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 06:19:14,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:19:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-09 06:19:14,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347854092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:19:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059075659] [2024-11-09 06:19:14,994 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:19:14,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:19:14,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:19:14,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:19:14,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:19:16,308 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:19:17,091 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1076| Int)) (let ((.cse0 (= |v_ULTIMATE.start_main_~i~0#1_1076| 0)) (.cse1 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1076|))) (and (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_1071| Int)) (let ((.cse4 (= |v_ULTIMATE.start_main_~i~0#1_1071| 0)) (.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1071|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1071|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1066| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1066|)) (.cse3 (= |v_ULTIMATE.start_main_~i~0#1_1066| 0))) (and (or (and .cse1 .cse2) .cse3) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1066|) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1066| c_~SIZE~0) .cse2) .cse3)))) .cse4) (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1071| c_~SIZE~0) .cse5)) (or .cse4 (and .cse1 .cse5)))))) (and .cse1 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_1076| c_~SIZE~0))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1076|) (or .cse0 (and .cse1 .cse6))))) is different from true [2024-11-09 06:19:18,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11337#(exists ((|v_ULTIMATE.start_main_~i~0#1_1076| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1076|) (or (= |v_ULTIMATE.start_main_~i~0#1_1076| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1076|) (<= 1 ~SIZE~0))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1076|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1076|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1076| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1071| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_1071| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1071|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1071|) (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1071|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1071|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1071| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1066| Int)) (and (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1066|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1066|)) (= |v_ULTIMATE.start_main_~i~0#1_1066| 0)) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1066|)) (= |v_ULTIMATE.start_main_~i~0#1_1066| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1066|)))))))))))' at error location [2024-11-09 06:19:18,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:19:18,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:19:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-09 06:19:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48720682] [2024-11-09 06:19:18,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:19:18,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:19:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:19:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:19:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1006, Unknown=1, NotChecked=66, Total=1260 [2024-11-09 06:19:18,814 INFO L87 Difference]: Start difference. First operand 243 states and 265 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:19:19,630 INFO L93 Difference]: Finished difference Result 461 states and 504 transitions. [2024-11-09 06:19:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:19:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-11-09 06:19:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:19:19,633 INFO L225 Difference]: With dead ends: 461 [2024-11-09 06:19:19,633 INFO L226 Difference]: Without dead ends: 152 [2024-11-09 06:19:19,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 301 SyntacticMatches, 24 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=241, Invalid=1244, Unknown=1, NotChecked=74, Total=1560 [2024-11-09 06:19:19,635 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:19:19,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 45 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:19:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-09 06:19:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2024-11-09 06:19:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 134 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2024-11-09 06:19:19,658 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 116 [2024-11-09 06:19:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:19:19,658 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2024-11-09 06:19:19,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2024-11-09 06:19:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:19:19,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:19:19,661 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:19:19,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:19:19,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:19:19,866 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:19:19,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:19:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -262730012, now seen corresponding path program 11 times [2024-11-09 06:19:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:19:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528831446] [2024-11-09 06:19:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:19:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:19:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:19:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:19:20,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:19:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528831446] [2024-11-09 06:19:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528831446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:19:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976108473] [2024-11-09 06:19:20,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:19:20,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:19:20,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:19:20,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:19:20,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:19:20,381 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:19:20,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:19:20,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:19:20,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:19:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:19:20,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:19:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:19:20,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976108473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:19:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779112925] [2024-11-09 06:19:20,772 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:19:20,772 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:19:20,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:19:20,773 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:19:20,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:19:22,103 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:19:23,127 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1172| Int)) (let ((.cse0 (= |v_ULTIMATE.start_main_~i~0#1_1172| 0)) (.cse1 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1172|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1172|) (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_1167| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1167|)) (.cse3 (= |v_ULTIMATE.start_main_~i~0#1_1167| 0))) (and (or (and .cse1 .cse2) .cse3) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1167|) (or (and .cse1 .cse2 (= |v_ULTIMATE.start_main_~i~0#1_1167| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1162| Int)) (let ((.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1162|)) (.cse5 (= |v_ULTIMATE.start_main_~i~0#1_1162| 0))) (and (or (and .cse1 .cse4 (= |v_ULTIMATE.start_main_~i~0#1_1162| c_~SIZE~0)) .cse5) (or (and .cse1 .cse4) .cse5) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1162|)))) .cse3)))))) (and .cse1 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_1172| c_~SIZE~0))) (or .cse0 (and .cse1 .cse6))))) is different from true [2024-11-09 06:19:24,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13058#(exists ((|v_ULTIMATE.start_main_~i~0#1_1172| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1172|) (or (= |v_ULTIMATE.start_main_~i~0#1_1172| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1172|) (<= 1 ~SIZE~0))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1172|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1172|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1172| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1167| Int)) (and (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1162| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1162|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1162|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_1162| 0)) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1162|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_1162| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1162|))) (= |v_ULTIMATE.start_main_~i~0#1_1167| 0)) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1167|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1167|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1167|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1167|)) (= |v_ULTIMATE.start_main_~i~0#1_1167| 0))))))))' at error location [2024-11-09 06:19:24,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:19:24,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:19:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-09 06:19:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136362115] [2024-11-09 06:19:24,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:19:24,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:19:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:19:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:19:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=936, Unknown=1, NotChecked=64, Total=1190 [2024-11-09 06:19:24,581 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:19:25,287 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2024-11-09 06:19:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:19:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-09 06:19:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:19:25,289 INFO L225 Difference]: With dead ends: 151 [2024-11-09 06:19:25,289 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 06:19:25,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 361 SyntacticMatches, 25 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=350, Invalid=1545, Unknown=1, NotChecked=84, Total=1980 [2024-11-09 06:19:25,290 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:19:25,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 29 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:19:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 06:19:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2024-11-09 06:19:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2024-11-09 06:19:25,312 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 134 [2024-11-09 06:19:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:19:25,312 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2024-11-09 06:19:25,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:19:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2024-11-09 06:19:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 06:19:25,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:19:25,313 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:19:25,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:19:25,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:19:25,514 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:19:25,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:19:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash 715281865, now seen corresponding path program 12 times [2024-11-09 06:19:25,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:19:25,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104224070] [2024-11-09 06:19:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:19:25,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:19:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:19:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 2 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:19:45,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:19:45,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104224070] [2024-11-09 06:19:45,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104224070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:19:45,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882510083] [2024-11-09 06:19:45,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:19:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:19:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:19:45,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:19:45,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:19:45,208 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:19:45,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:19:45,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-11-09 06:19:45,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:19:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:19:55,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:13,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:20:13,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 235 [2024-11-09 06:20:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:20:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882510083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922143371] [2024-11-09 06:20:15,088 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:20:15,088 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:15,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:15,088 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:15,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:16,526 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:17,274 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1330| Int)) (let ((.cse0 (<= 1 c_~SIZE~0)) (.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1330|)) (.cse2 (= |v_ULTIMATE.start_main_~i~0#1_1330| 0))) (and (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1330| c_~SIZE~0)) (and .cse2 (exists ((|v_ULTIMATE.start_main_~i~0#1_1325| Int)) (let ((.cse4 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1325|)) (.cse3 (= |v_ULTIMATE.start_main_~i~0#1_1325| 0))) (and (or .cse3 (and .cse0 .cse4)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1325|) (or (and .cse0 .cse4 (= |v_ULTIMATE.start_main_~i~0#1_1325| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1320| Int)) (let ((.cse5 (= |v_ULTIMATE.start_main_~i~0#1_1320| 0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1320|))) (and (or .cse5 (and .cse0 .cse6)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1320|) (or .cse5 (and .cse0 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_1320| c_~SIZE~0)))))) .cse3))))))) (or (and .cse0 .cse1) .cse2) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1330|)))) is different from true [2024-11-09 06:20:27,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14512#(exists ((|v_ULTIMATE.start_main_~i~0#1_1330| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1330|) (or (= |v_ULTIMATE.start_main_~i~0#1_1330| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1330|) (<= 1 ~SIZE~0))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1330|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1330|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1330| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1325| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1325|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1325|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1325| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1320| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1320|)) (= |v_ULTIMATE.start_main_~i~0#1_1320| 0)) (or (= |v_ULTIMATE.start_main_~i~0#1_1320| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1320|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1320|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1320|))))) (or (= |v_ULTIMATE.start_main_~i~0#1_1325| 0) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1325|) (<= 1 ~SIZE~0))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1325|)))))))' at error location [2024-11-09 06:20:27,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:27,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:27,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 56, 59] total 183 [2024-11-09 06:20:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505393236] [2024-11-09 06:20:27,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:27,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2024-11-09 06:20:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2024-11-09 06:20:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=38143, Unknown=1, NotChecked=392, Total=39402 [2024-11-09 06:20:27,912 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 183 states, 183 states have (on average 2.098360655737705) internal successors, (384), 183 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:15,437 INFO L93 Difference]: Finished difference Result 513 states and 561 transitions. [2024-11-09 06:21:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-09 06:21:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 2.098360655737705) internal successors, (384), 183 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-11-09 06:21:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:15,440 INFO L225 Difference]: With dead ends: 513 [2024-11-09 06:21:15,440 INFO L226 Difference]: Without dead ends: 397 [2024-11-09 06:21:15,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 268 SyntacticMatches, 17 SemanticMatches, 296 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19410 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=2664, Invalid=85251, Unknown=1, NotChecked=590, Total=88506 [2024-11-09 06:21:15,446 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 743 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 22880 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 23715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 22880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:15,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 739 Invalid, 23715 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [835 Valid, 22880 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2024-11-09 06:21:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-09 06:21:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 319. [2024-11-09 06:21:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.0723270440251573) internal successors, (341), 318 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 341 transitions. [2024-11-09 06:21:15,514 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 341 transitions. Word has length 136 [2024-11-09 06:21:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:15,515 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 341 transitions. [2024-11-09 06:21:15,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 2.098360655737705) internal successors, (384), 183 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 341 transitions. [2024-11-09 06:21:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:21:15,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:15,517 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:15,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:15,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:21:15,722 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:21:15,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1223393810, now seen corresponding path program 13 times [2024-11-09 06:21:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:15,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799820316] [2024-11-09 06:21:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:21:16,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799820316] [2024-11-09 06:21:16,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799820316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83889930] [2024-11-09 06:21:16,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:21:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:16,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:16,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:21:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:16,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:21:16,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:21:16,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-09 06:21:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83889930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766091243] [2024-11-09 06:21:16,720 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:21:16,721 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:16,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:16,723 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:16,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:18,158 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:18,869 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1460| Int)) (let ((.cse6 (= |v_ULTIMATE.start_main_~i~0#1_1460| 0)) (.cse0 (<= 1 c_~SIZE~0)) (.cse1 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1460|))) (and (or (and .cse0 .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1460| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1455| Int)) (let ((.cse3 (= |v_ULTIMATE.start_main_~i~0#1_1455| 0)) (.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1455|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1455|) (or (and .cse0 .cse2) .cse3) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1450| Int)) (let ((.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1450|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_1450| 0))) (and (or .cse4 (and .cse0 .cse5)) (or (and .cse0 (= |v_ULTIMATE.start_main_~i~0#1_1450| c_~SIZE~0) .cse5) .cse4) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1450|)))) .cse3) (and .cse0 .cse2 (= |v_ULTIMATE.start_main_~i~0#1_1455| c_~SIZE~0)))))) .cse6)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1460|) (or .cse6 (and .cse0 .cse1))))) is different from true [2024-11-09 06:21:20,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16798#(exists ((|v_ULTIMATE.start_main_~i~0#1_1460| Int)) (and (or (and (= |v_ULTIMATE.start_main_~i~0#1_1460| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1455| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1455|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1450| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1450|) (or (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1450|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1450|)) (= |v_ULTIMATE.start_main_~i~0#1_1450| 0)) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1450|)) (= |v_ULTIMATE.start_main_~i~0#1_1450| 0)))) (= |v_ULTIMATE.start_main_~i~0#1_1455| 0)) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1455|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1455|))) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1455|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_1455| 0))))) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1460|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1460|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1460|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1460|)) (= |v_ULTIMATE.start_main_~i~0#1_1460| 0))))' at error location [2024-11-09 06:21:20,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:20,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-09 06:21:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472180727] [2024-11-09 06:21:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:20,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:21:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:21:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1191, Unknown=1, NotChecked=72, Total=1482 [2024-11-09 06:21:20,637 INFO L87 Difference]: Start difference. First operand 319 states and 341 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:21,607 INFO L93 Difference]: Finished difference Result 429 states and 457 transitions. [2024-11-09 06:21:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:21:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-11-09 06:21:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:21,610 INFO L225 Difference]: With dead ends: 429 [2024-11-09 06:21:21,610 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 06:21:21,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 363 SyntacticMatches, 27 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=293, Invalid=1516, Unknown=1, NotChecked=82, Total=1892 [2024-11-09 06:21:21,611 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 264 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:21,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 52 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:21:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 06:21:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2024-11-09 06:21:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2024-11-09 06:21:21,656 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 138 [2024-11-09 06:21:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:21,657 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2024-11-09 06:21:21,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:21:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2024-11-09 06:21:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-09 06:21:21,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:21,658 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:21,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:21,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:21:21,863 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:21:21,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1625677696, now seen corresponding path program 14 times [2024-11-09 06:21:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:21,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735735044] [2024-11-09 06:21:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 26 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:21:45,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:45,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735735044] [2024-11-09 06:21:45,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735735044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:45,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231830257] [2024-11-09 06:21:45,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:21:45,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:45,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:45,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:45,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:21:45,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:21:45,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:45,310 WARN L253 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 300 conjuncts are in the unsatisfiable core [2024-11-09 06:21:45,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:45,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 06:21:45,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 06:21:45,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:21:45,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-09 06:21:45,917 INFO L349 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2024-11-09 06:21:45,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2024-11-09 06:21:46,141 INFO L349 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2024-11-09 06:21:46,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 06:21:46,362 INFO L349 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2024-11-09 06:21:46,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 06:22:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:22:09,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:22:09,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 158 [2024-11-09 06:22:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:22:10,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:22:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231830257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234669270] [2024-11-09 06:22:41,201 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:22:41,201 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:41,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:41,201 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:41,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:42,287 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:43,064 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1656| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1656|)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_1656| 0)) (.cse1 (<= 1 c_~SIZE~0))) (and (or .cse0 (and .cse1 .cse2)) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1656| c_~SIZE~0) .cse2) (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_1651| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1651|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_1651| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1651|) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1651| c_~SIZE~0) .cse3) (and .cse4 (exists ((|v_ULTIMATE.start_main_~i~0#1_1646| Int)) (let ((.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1646|)) (.cse6 (= |v_ULTIMATE.start_main_~i~0#1_1646| 0))) (and (or (and .cse1 .cse5) .cse6) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1646| c_~SIZE~0) .cse5) .cse6) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1646|)))))) (or (and .cse1 .cse3) .cse4)))))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1656|)))) is different from true [2024-11-09 06:22:59,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18879#(exists ((|v_ULTIMATE.start_main_~i~0#1_1656| Int)) (and (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1656|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1656|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1656| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1651| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_1651| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1651|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1651|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1646| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1646|) (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1646|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1646|)) (= |v_ULTIMATE.start_main_~i~0#1_1646| 0)) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1646|)) (= |v_ULTIMATE.start_main_~i~0#1_1646| 0)))) (= |v_ULTIMATE.start_main_~i~0#1_1651| 0)) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1651|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1651|))))))) (or (= |v_ULTIMATE.start_main_~i~0#1_1656| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1656|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1656|)))' at error location [2024-11-09 06:22:59,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:59,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 83, 81] total 244 [2024-11-09 06:22:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069131303] [2024-11-09 06:22:59,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:59,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 244 states [2024-11-09 06:22:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2024-11-09 06:22:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2935, Invalid=63889, Unknown=2, NotChecked=514, Total=67340 [2024-11-09 06:22:59,981 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 244 states, 244 states have (on average 1.8975409836065573) internal successors, (463), 244 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:44,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 06:24:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:50,011 INFO L93 Difference]: Finished difference Result 660 states and 712 transitions. [2024-11-09 06:24:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-11-09 06:24:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 244 states, 244 states have (on average 1.8975409836065573) internal successors, (463), 244 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2024-11-09 06:24:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:50,015 INFO L225 Difference]: With dead ends: 660 [2024-11-09 06:24:50,015 INFO L226 Difference]: Without dead ends: 524 [2024-11-09 06:24:50,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 283 SyntacticMatches, 18 SemanticMatches, 389 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39083 ImplicationChecksByTransitivity, 141.9s TimeCoverageRelationStatistics Valid=8748, Invalid=142962, Unknown=4, NotChecked=776, Total=152490 [2024-11-09 06:24:50,025 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2750 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 39972 mSolverCounterSat, 3128 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2750 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 43102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3128 IncrementalHoareTripleChecker+Valid, 39972 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:50,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2750 Valid, 1138 Invalid, 43102 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3128 Valid, 39972 Invalid, 2 Unknown, 0 Unchecked, 40.9s Time] [2024-11-09 06:24:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-11-09 06:24:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 417. [2024-11-09 06:24:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.0673076923076923) internal successors, (444), 416 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 444 transitions. [2024-11-09 06:24:50,120 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 444 transitions. Word has length 158 [2024-11-09 06:24:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:50,121 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 444 transitions. [2024-11-09 06:24:50,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 244 states, 244 states have (on average 1.8975409836065573) internal successors, (463), 244 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 444 transitions. [2024-11-09 06:24:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 06:24:50,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:50,123 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:50,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:50,324 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:24:50,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 887582821, now seen corresponding path program 15 times [2024-11-09 06:24:50,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:50,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817861700] [2024-11-09 06:24:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:50,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-09 06:24:50,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:50,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817861700] [2024-11-09 06:24:50,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817861700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003882349] [2024-11-09 06:24:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:24:50,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:50,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:50,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:50,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:24:50,773 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:24:50,773 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:50,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:24:50,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-09 06:24:51,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-09 06:24:51,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003882349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:51,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639092506] [2024-11-09 06:24:51,342 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:24:51,342 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:51,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:51,343 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:51,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:52,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:53,432 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1792| Int)) (let ((.cse1 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1792|)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_1792| 0))) (and (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_1787| Int)) (let ((.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1787|)) (.cse5 (= |v_ULTIMATE.start_main_~i~0#1_1787| 0))) (and (or (and .cse1 .cse2 (= |v_ULTIMATE.start_main_~i~0#1_1787| c_~SIZE~0)) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1782| Int)) (let ((.cse4 (= |v_ULTIMATE.start_main_~i~0#1_1782| 0)) (.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1782|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1782|) (or (and .cse1 .cse3) .cse4) (or .cse4 (and .cse1 .cse3 (= |v_ULTIMATE.start_main_~i~0#1_1782| c_~SIZE~0)))))) .cse5)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1787|) (or (and .cse1 .cse2) .cse5))))) (and .cse1 .cse6 (= |v_ULTIMATE.start_main_~i~0#1_1792| c_~SIZE~0))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1792|) (or (and .cse1 .cse6) .cse0)))) is different from true [2024-11-09 06:24:55,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21732#(exists ((|v_ULTIMATE.start_main_~i~0#1_1792| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_1792| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1792|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1792|) (or (and (= |v_ULTIMATE.start_main_~i~0#1_1792| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1787| Int)) (and (or (= |v_ULTIMATE.start_main_~i~0#1_1787| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1787|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1787|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1782| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1782|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1782|)) (= |v_ULTIMATE.start_main_~i~0#1_1782| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1782|) (or (= |v_ULTIMATE.start_main_~i~0#1_1782| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1782|))))) (= |v_ULTIMATE.start_main_~i~0#1_1787| 0)) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1787|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1787|)))))) (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1792|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1792|)))))' at error location [2024-11-09 06:24:55,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:55,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-09 06:24:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243839395] [2024-11-09 06:24:55,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:55,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 06:24:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 06:24:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1390, Unknown=1, NotChecked=78, Total=1722 [2024-11-09 06:24:55,346 INFO L87 Difference]: Start difference. First operand 417 states and 444 transitions. Second operand has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:56,427 INFO L93 Difference]: Finished difference Result 662 states and 707 transitions. [2024-11-09 06:24:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:24:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2024-11-09 06:24:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:56,429 INFO L225 Difference]: With dead ends: 662 [2024-11-09 06:24:56,429 INFO L226 Difference]: Without dead ends: 192 [2024-11-09 06:24:56,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 423 SyntacticMatches, 32 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=352, Invalid=1813, Unknown=1, NotChecked=90, Total=2256 [2024-11-09 06:24:56,431 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 398 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:56,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 52 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:24:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-09 06:24:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2024-11-09 06:24:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0611111111111111) internal successors, (191), 180 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2024-11-09 06:24:56,484 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 160 [2024-11-09 06:24:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:56,485 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2024-11-09 06:24:56,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:24:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2024-11-09 06:24:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-09 06:24:56,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:56,486 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:56,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:24:56,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:24:56,692 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:24:56,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -967862281, now seen corresponding path program 16 times [2024-11-09 06:24:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757340031] [2024-11-09 06:24:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 26 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:26,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757340031] [2024-11-09 06:25:26,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757340031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728820708] [2024-11-09 06:25:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:25:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:26,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:25:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:26,349 WARN L253 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 303 conjuncts are in the unsatisfiable core [2024-11-09 06:25:26,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:27,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 06:25:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:25:43,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-09 06:26:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728820708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069698991] [2024-11-09 06:26:16,708 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:26:16,708 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:16,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:16,709 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:16,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:17,808 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:18,500 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_1998| Int)) (let ((.cse0 (= |v_ULTIMATE.start_main_~i~0#1_1998| 0)) (.cse1 (<= 1 c_~SIZE~0)) (.cse2 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1998|))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1998|) (or .cse0 (and .cse1 .cse2)) (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_1993| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1993|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_1993| 0))) (and (or (and .cse1 .cse3) .cse4) (or (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1993| c_~SIZE~0) .cse3) (and (exists ((|v_ULTIMATE.start_main_~i~0#1_1988| Int)) (let ((.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_1988|)) (.cse6 (= |v_ULTIMATE.start_main_~i~0#1_1988| 0))) (and (or (and .cse1 .cse5) .cse6) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1988|) (or (and .cse1 .cse5 (= |v_ULTIMATE.start_main_~i~0#1_1988| c_~SIZE~0)) .cse6)))) .cse4)) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1993|))))) (and .cse1 (= |v_ULTIMATE.start_main_~i~0#1_1998| c_~SIZE~0) .cse2))))) is different from true [2024-11-09 06:26:35,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24335#(exists ((|v_ULTIMATE.start_main_~i~0#1_1998| Int)) (and (or (and (= |v_ULTIMATE.start_main_~i~0#1_1998| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1993| Int)) (and (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1993|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1993|)) (and (= |v_ULTIMATE.start_main_~i~0#1_1993| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_1988| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1988|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1988|)) (= |v_ULTIMATE.start_main_~i~0#1_1988| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1988|) (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_1988|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_1988| 0)))))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1993|) (or (= |v_ULTIMATE.start_main_~i~0#1_1993| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1993|)))))) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1998|) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1998|))) (or (= |v_ULTIMATE.start_main_~i~0#1_1998| 0) (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_1998|))) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_1998|)))' at error location [2024-11-09 06:26:35,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:35,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 82, 79] total 250 [2024-11-09 06:26:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845121955] [2024-11-09 06:26:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:35,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 250 states [2024-11-09 06:26:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2024-11-09 06:26:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=68758, Unknown=1, NotChecked=526, Total=70490 [2024-11-09 06:26:35,989 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 250 states, 250 states have (on average 2.064) internal successors, (516), 250 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:51,840 INFO L93 Difference]: Finished difference Result 665 states and 713 transitions. [2024-11-09 06:27:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2024-11-09 06:27:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 250 states, 250 states have (on average 2.064) internal successors, (516), 250 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2024-11-09 06:27:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:51,844 INFO L225 Difference]: With dead ends: 665 [2024-11-09 06:27:51,844 INFO L226 Difference]: Without dead ends: 513 [2024-11-09 06:27:51,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 351 SyntacticMatches, 21 SemanticMatches, 391 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39041 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=4042, Invalid=149233, Unknown=1, NotChecked=780, Total=154056 [2024-11-09 06:27:51,851 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 871 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 37093 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 38052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 37093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:51,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 843 Invalid, 38052 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [959 Valid, 37093 Invalid, 0 Unknown, 0 Unchecked, 29.6s Time] [2024-11-09 06:27:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-09 06:27:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 415. [2024-11-09 06:27:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.0555555555555556) internal successors, (437), 414 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 437 transitions. [2024-11-09 06:27:51,947 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 437 transitions. Word has length 180 [2024-11-09 06:27:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:51,948 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 437 transitions. [2024-11-09 06:27:51,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 250 states, 250 states have (on average 2.064) internal successors, (516), 250 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 437 transitions. [2024-11-09 06:27:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-11-09 06:27:51,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:51,950 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:51,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:27:52,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:27:52,151 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:52,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:52,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1985989788, now seen corresponding path program 17 times [2024-11-09 06:27:52,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:52,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307308607] [2024-11-09 06:27:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:52,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2024-11-09 06:27:52,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307308607] [2024-11-09 06:27:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307308607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:52,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269671925] [2024-11-09 06:27:52,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:27:52,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:52,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:52,498 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:52,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:27:52,754 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:27:52,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:52,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:27:52,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2024-11-09 06:27:53,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2024-11-09 06:27:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269671925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:53,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822776304] [2024-11-09 06:27:53,311 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 06:27:53,311 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:53,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:53,311 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:53,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:54,450 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:55,220 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~i~0#1_2154| Int)) (let ((.cse2 (<= 1 c_~SIZE~0)) (.cse6 (<= 1 |v_ULTIMATE.start_main_~i~0#1_2154|)) (.cse0 (= |v_ULTIMATE.start_main_~i~0#1_2154| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2154|) (or (and .cse0 (exists ((|v_ULTIMATE.start_main_~i~0#1_2149| Int)) (let ((.cse5 (<= 1 |v_ULTIMATE.start_main_~i~0#1_2149|)) (.cse1 (= |v_ULTIMATE.start_main_~i~0#1_2149| 0))) (and (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2149|) (or (and .cse1 (exists ((|v_ULTIMATE.start_main_~i~0#1_2144| Int)) (let ((.cse3 (<= 1 |v_ULTIMATE.start_main_~i~0#1_2144|)) (.cse4 (= |v_ULTIMATE.start_main_~i~0#1_2144| 0))) (and (or (and .cse2 (= |v_ULTIMATE.start_main_~i~0#1_2144| c_~SIZE~0) .cse3) .cse4) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2144|) (or (and .cse2 .cse3) .cse4))))) (and .cse2 .cse5 (= |v_ULTIMATE.start_main_~i~0#1_2149| c_~SIZE~0))) (or (and .cse2 .cse5) .cse1))))) (and .cse2 (= |v_ULTIMATE.start_main_~i~0#1_2154| c_~SIZE~0) .cse6)) (or (and .cse2 .cse6) .cse0)))) is different from true [2024-11-09 06:27:57,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27319#(exists ((|v_ULTIMATE.start_main_~i~0#1_2154| Int)) (and (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2154|) (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_2154|)) (= |v_ULTIMATE.start_main_~i~0#1_2154| 0)) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_2149| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_2149|) (<= 1 ~SIZE~0)) (= |v_ULTIMATE.start_main_~i~0#1_2149| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2149|) (or (and (exists ((|v_ULTIMATE.start_main_~i~0#1_2144| Int)) (and (or (and (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_2144|)) (= |v_ULTIMATE.start_main_~i~0#1_2144| 0)) (<= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2144|) (or (and (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2144|) (<= 1 ~SIZE~0) (<= 1 |v_ULTIMATE.start_main_~i~0#1_2144|)) (= |v_ULTIMATE.start_main_~i~0#1_2144| 0)))) (= |v_ULTIMATE.start_main_~i~0#1_2149| 0)) (and (<= 1 |v_ULTIMATE.start_main_~i~0#1_2149|) (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2149|))))) (= |v_ULTIMATE.start_main_~i~0#1_2154| 0)) (and (<= 1 ~SIZE~0) (= ~SIZE~0 |v_ULTIMATE.start_main_~i~0#1_2154|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_2154|)))))' at error location [2024-11-09 06:27:57,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:57,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-09 06:27:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901788498] [2024-11-09 06:27:57,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:57,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:27:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:27:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1603, Unknown=1, NotChecked=84, Total=1980 [2024-11-09 06:27:57,138 INFO L87 Difference]: Start difference. First operand 415 states and 437 transitions. Second operand has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:58,292 INFO L93 Difference]: Finished difference Result 553 states and 581 transitions. [2024-11-09 06:27:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:27:58,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2024-11-09 06:27:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:58,294 INFO L225 Difference]: With dead ends: 553 [2024-11-09 06:27:58,294 INFO L226 Difference]: Without dead ends: 214 [2024-11-09 06:27:58,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 485 SyntacticMatches, 35 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=418, Invalid=2135, Unknown=1, NotChecked=98, Total=2652 [2024-11-09 06:27:58,295 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 560 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:58,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 43 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:27:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-09 06:27:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2024-11-09 06:27:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0544554455445545) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 213 transitions. [2024-11-09 06:27:58,339 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 213 transitions. Word has length 182 [2024-11-09 06:27:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:58,339 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 213 transitions. [2024-11-09 06:27:58,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:27:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 213 transitions. [2024-11-09 06:27:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-09 06:27:58,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:58,340 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:58,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:27:58,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:58,541 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:58,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1651463122, now seen corresponding path program 18 times [2024-11-09 06:27:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069511336] [2024-11-09 06:27:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 74 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:28:36,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:36,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069511336] [2024-11-09 06:28:36,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069511336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20711783] [2024-11-09 06:28:36,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:28:36,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:36,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:36,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_583dcd9d-adf0-4d63-b117-301cd1c983f9/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:28:37,191 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:28:37,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:28:37,197 WARN L253 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-11-09 06:28:37,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:37,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 06:28:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 06:28:59,240 INFO L311 TraceCheckSpWp]: Computing backward predicates...